The engine oil systems of certain Mitsubishi applications
may produce abnormally high oil pressure, exceeding the structural
capacity of standard spin-on oil filters, including the AMSOIL SDF-20.
Improper operation of the pressure-regulating valve in the engine causes
the high oil pressure, resulting in over-pressurization of the lubricating
system and damage to the oil filter.

AMSOIL has decided to withdraw recommendation of the
SDF-20 in place of the Mitsubishi part number MZ690116 oil filter. The
AMSOIL SDF-20 continues to be the recommended filter for many other
applications not associated with this problem.